Butterfly spring toy



FIG. 1 is a perspective view of a butterfly spring toy showing my new design;

FIG. 2 is the top plan view thereof;

FIG. 3 is the bottom plan view thereof;

FIG. 4 is the left side elevational view thereof;

FIG. 5 is the right side view thereof;

FIG. 6 is the rear elevational view thereof; and,

FIG. 7 is the front elevational view thereof. 

The ornamental design for a butterfly spring toy, as shown and described. 